Value Collection 451046BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451046BR is a Grade 8 steel hex head cap screw designed for high-strength fastening applications. It measures 1-1/4-12 UNF thread with a 5-1/2 inch length under head and features partial threading along the shank. The bright, uncoated finish is standard for structural and mechanical assemblies where surface treatment is applied separately or not required. This fastener meets ASME B18.2.1 dimensional standards and is sized for a 1-7/8 inch hex key. Machinists, millwrights, and mechanical contractors install this type of hardware in heavy equipment, structural steel connections, and industrial machinery.

This cap screw is suited for applications requiring a fine-thread UNF fastener in large diameters, where higher clamping force and vibration resistance are priorities over coarse-thread alternatives. Partial threading allows the unthreaded shank to bear shear loads in bolted connections, making it appropriate for clevis pins, flange joints, and close-tolerance mechanical assemblies. It is sold individually and is packaged as a single unit.

Key Features

• Grade 8 steel construction for high tensile and proof-load strength
• 1-1/4-12 UNF thread provides fine-pitch engagement for increased clamping force
• Partially threaded shank supports shear-load bearing in bolted joints
• Bright/uncoated finish meets ASME B18.2.1 dimensional requirements
• 1-7/8 inch hex drive size compatible with standard heavy-duty wrenching tools

Compatibility

Designed as an OEM-style replacement or standard-service fastener for industrial and mechanical assemblies requiring a 1-1/4-12 UNF Grade 8 hex head cap screw per ASME B18.2.1.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using calibrated torque equipment appropriate for Grade 8 fasteners at this diameter. Ensure mating threads are clean and free of debris before assembly. Do not mix metric and inch fasteners in the same joint. Verify the tapped hole or nut grade matches Grade 8 requirements to avoid thread stripping under load.